Engine.



No. 842,446. f PATENTED JAN. 29, 1.907.

I. 1).-GHRITT0N.

, ENGINE.

PPLIGATI-QN FILED HEFT. 14,1906.

1'r0.'a42,446. PATENTBD JAN. 29,1907.

. I. D. CNRITTUN.

ENGINE.

NIV

La. Y WHL/VANNES [Eid ZZZ; y@ /ff/w I shafts, the shafts ISAIAHCHRITTON, OF GRAVES, KANSAS.

ENGINE.

Specification of Letters Patent.

Patented Jan. 29, 1907.

Application filed September 14, 1906. Serial No. 334,627.

Be it known that I, IsArAH D. CHRITTON, a citizen of the United States,residing at Graves, in the county of Cloud and State of Kansas, haveinvented a new and useful Engine, of which the following is aspecification.

This invention relates to engines of that general type in whichoscillatory pistons are employed, and has for one of its objects toprovide an engine of simple construction in which a pair of oscillatorypistons are arranged within a suitable cylinder, provision being madefor introducing steam or other fluid under pressure between the twopistons, and thus operating simultaneously on both.

-A further object of the invention is to provide an engine of this typein which the oscillatoryv pistons are mounted on concentric carryingrocker arms which are connected to a wrist-pin carried by a crank-diskon the main or power-transmitting shaft.

A still further object of the invention is to provide an engine of thisstyle in which the connections between the main or powertransmittingshaft and the oscillatory pistons are such as to insure the utmostregularity of movement of the pistons and prevent any danger of eithercoming in contact with each other.

With these and other objects in view, as will more fully hereinafterappear, the invention consists in the novel construction and arrangementof parts hereinafter fully described, illustrated in the accompanyingdrawings, and particularly pointed out in the appended claims, it beingunderstood that various changes in the form, proportions, size, andminor details of the structure may be made without departing from thespirit or sacrificing any of the advantages of the in-l vention.

Figure 1 is a side elevation of an engine constructed in accordance withthe invention. the same on the line 2 2 of Fig. 4. Fig. 3 is a similarview on the line 3 3 of Fig. 4. Fig.- 4 is a sectional view of theengine on the line 4 4 of Fig. 2.

Similar numerals of reference indicate corresponding parts in each ofthe several iigures of the drawings.-

The base or foundation on which the engine is mounted is provided withstandards 10, having bearings for the reception of a Fig. 2 is atransverse sectional view of shaft 11, which extends through thecylinder and the steam-chest, and mounted on this shaft is a secondshaft 12, these two shafts serving for the purpose of transmittingmovement from the piston members to the main or power-transmitting shaft15, which latter Vis mounted in bearings carried by standards 16.

The cylinder, which is annular in form, is formed of two sections 19 and20, having suitable bolting-ianges and bolts by which they are rmly heldtogether.

The central portion of the cylinder is cut away down to the shaft 11 forthe reception of two disks 22 and 23, the disk 22 being keyed orotherwise secured to the shaft 11, while the disk 23 is carried by orforms an integral part of the hollow shaft 12. To these disks aresecured piston members 24 and 25, respectively, the piston members beingeach provided with pressure-surfaces arranged at an angle of aboutninety degrees from each other and having suitable packing-rings thatfit within the annular cylinder. Each piston is arranged to oscillatethrough an arc of ninety degrees, and the pistons move in oppositedirections, respectively, steam being introduced between the opposedfaces at one side and being exhausted from the space between the opposedfaces at the opposite side.

To the ends of shafts 1l and 12 are secured rocker-arms 26 and 27,respectively, and these rocker-arms are arranged at an angle of ninetydegrees from each other and are connected by rods 28 and 29 to awrist-pin 30, that is carried by a crank-disk31 on one end of thepower-transmitting shaft 15. As the iston members and the rocker-armsare oscillated through arcs of ninety degrees the wrist-pin will berevolved and motion will be transmitted to the shaft 15. At one side ofthe cylinder is a steam-chest 33, to which steam or other Huid underpressure is admitted through a pipe 34. One face of the chest is cutaway to form a valve-seat in which are two ports 35 36, leading to themain cylinder at points diametrically opposite each other, as indicatedby dotted lines in Fig. 2. In the valve-seat are cut exhaust-ports 38and 39, and all of the ports are under the control of a double Dslide-valve 40, which latter is operated from an eccentric 41 on shaft15 through the medium of a lever 43, a connecting-rod 44, and valve-stem45. The exhaust-ports 38 and 39 lead downwardly to an exhaust- IOO IIO

' the cylinder has a projecting hub that encirvcles and protects theshafts at the `oint vhere they pass through the exhaust-c am- Inoperation the valve 40 is moved to and fro for the purpose ofalternately opening the ports 45 and 46, and thus establishingoommunication between the source ofpressuresupply and the cylinder, thesteam or other fluid entering between the opposing faces of the pistonmembers, moving the same first in one direction and then inthe oppositedirection, and this movement is transmitted through the shafts and therocker-arms 26 and 27 to the wrist-pin 30.

pair of oppositely-movable pistons the power will be increased over theordinary engine and that, as there is no dead-center to overcome, thepower exerted on the wrist-pin will be continuous, varying, of course,with the angular position of the pin, and, further, that the eliminationof the crossheads, slides, and

the like friction is materially reduced and the power therefrom directedto the main shafts.

What is claimed is- The combination in an engine, of an annularcylinder, a pair of pistons arranged in the cylinder and each providedwith a pair of pressure-faces arranged approximately at ninety degreesfrom each other, piston-hub members to which said pistons are secured, apair of concentric shafts carrying the hub members, rocker-arms on saidshafts, a crankshaft, pitman connections between the rockerarms and thecrank-shaft, a steam-chest, an exhaust-chamber arranged at one side ofthe cylinder, said cylinder having a projecting hub member extendingaround the shafts to protect the same from the exhaust-steam, a

; slide-valve arranged in the steam-chest, and It will be seen that bythe employment of a l means for actuating the slide-valve.

In testimony that l claim the foregoing as my own l have hereto aflixedmy signature in the presence of two witnesses.

. ISAIAH D. HRITTON. l/Vitnesses 1 A. D. REID, H. l/V. BARBER.

